01Core principlesThe concepts and mechanisms needed to understand the subject.
Metastatic spinal cord compression occurs when vertebral metastasis, epidural tumour, vertebral collapse or direct malignant infiltration compresses the spinal cord or cauda equina. Neurological outcome depends heavily on function at treatment, so recognising a change while the patient is still walking is crucial. Breast, prostate and lung cancers are common contexts, but any malignancy can cause the syndrome and MSCC may reveal an occult primary.
NICE NG234 creates two different urgent routes. A person with current or previous cancer and symptoms or signs of cord or cauda equina compression needs immediate contact with the MSCC coordinator and emergency management. A person with cancer and pain characteristics suggesting spinal metastasis but no neurological features needs coordinator advice within 24 hours and MRI within 1 week. Conflating these populations either delays neurological rescue or overstates emergency treatment for pain-only disease.
Pain may precede deficit. Ask about severe unremitting pain, progressive pain, mechanical pain on movement, night pain disturbing sleep, pain aggravated by straining, local tenderness and radicular pain. Neurological assessment includes gait, power, tone, reflexes, plantar responses, sensory level, sacral symptoms and function. Record whether the person can walk and whether this is changing; a brief “neurology normal” entry is inadequate.
Whole-spine MRI defines vertebral disease, epidural soft tissue, level and degree of cord or cauda equina compression and additional lesions. Plain radiographs are not sensitive enough to exclude compression. If MRI is contraindicated, CT is considered; myelography after CT is reserved for rare specialist-centre circumstances because it is invasive. Do not order screening MRI solely to find early cord compression in an asymptomatic person with known spinal metastases.
Definitive treatment is multidisciplinary. Surgery can decompress and stabilise selected patients; urgent radiotherapy is used when MSCC is not suitable for spinal surgery, with regimen selected by oncology. The decision considers neurological trajectory, stability, disease burden, histology, radiosensitivity, prognosis, prior radiotherapy and the person’s goals. If the primary is unknown, image-guided biopsy can guide treatment only when immediate intervention is not required.
Corticosteroids reduce oedema but carry hyperglycaemia, infection, gastrointestinal, psychiatric and proximal-weakness risks. NICE’s 16 mg regimen is tied to neurological MSCC, not all metastases. Monitor glucose and provide proton-pump inhibition while corticosteroids are used. If imaging rules out spinal metastases and MSCC, discontinue dexamethasone; after definitive treatment, taper rather than stopping prolonged treatment abruptly.
Key points
- MSCC in NICE NG234 means malignant compression of the spinal cord or cauda equina; it is not a label for every spinal metastasis or every episode of cancer-related back pain.
- Cancer plus neurological symptoms or signs is an oncological emergency: contact the MSCC coordinator immediately and obtain whole-spine MRI as soon as possible, always within 24 hours.
- Cancer plus suspicious spinal pain without cord symptoms still needs MSCC-service advice within 24 hours, but MRI is within 1 week rather than the emergency neurological pathway.
- Give dexamethasone 16 mg as soon as possible for neurological symptoms or signs of MSCC, continue 16 mg daily while awaiting surgery or radiotherapy, then taper after surgery or at radiotherapy start under specialist direction.
- Do not routinely give corticosteroids to every patient with spinal metastases. Without neurological signs, NICE limits consideration to severe pain or haematological malignancy, with a specific pre-biopsy caution for suspected lymphoma/myeloma.
- MRI must cover the whole spine with sagittal T1 and/or STIR and T2 sequences plus axial imaging through significant abnormalities because disease can be multilevel.
02Mechanisms and patternsImportant relationships and how to distinguish them.
Gait change, weakness, sensory level, hyperreflexia, extensor plantar responses and sphincter dysfunction imply myelopathy. Early lesions may present with pain and subtle walking difficulty before dense paralysis.
Radicular pain, lower-motor-neuron weakness, saddle sensory change and bladder/bowel dysfunction may reflect compression below the conus; treat malignant cauda equina compression within the MSCC emergency pathway.
Severe unremitting, progressive, mechanical, night or strain-provoked pain and local spinal tenderness suggest spinal metastasis even without neurology; seek coordinator advice within 24 hours.
Pain on standing or movement, deformity, collapse and load-related pain raise instability. Use a validated stability score only as part of specialist assessment, not as a substitute for examination and imaging.
Lymphoma and myeloma may be steroid-responsive, but corticosteroids before tissue diagnosis can reduce biopsy yield. With no neurological signs, obtain specialist haematology advice first.
Degenerative disease, osteoporotic fracture, infection, epidural haematoma and leptomeningeal disease may coexist with cancer. Fever, anticoagulation or an abrupt pain-deficit sequence should widen the pathway.
03Interpreting evidenceInformation, measurements and their limitations.
Consider the information, its meaning and its limitations before deciding what follows.
- 01
Whole-spine MRI - Why
- Identify all metastatic levels, epidural tumour and the degree of cord or cauda equina compromise.
- Interpretation and limitations
- For suspected MSCC, perform as soon as possible and within 24 hours. Include sagittal T1 and/or STIR, sagittal T2 and axial imaging through abnormalities. Pain-only suspected metastasis without MSCC uses the within-1-week route.
- 02
Neurological and functional baseline - Why
- Determine the pre-treatment deficit and detect progression.
- Interpretation and limitations
- Record gait or ambulatory status, segmental power, tone, reflexes, plantar responses, sensation including a level, and bladder/bowel function. Serial deterioration overrides a previously reassuring snapshot.
- 03
CT spine - Why
- Assess bony anatomy, fracture and surgical/radiotherapy planning, or provide imaging when MRI is contraindicated.
- Interpretation and limitations
- CT complements rather than routinely replaces MRI for epidural and neural structures. CT myelography is a rare specialist alternative when MRI cannot be done.
- 04
Stability and prognostic assessment - Why
- Support decisions about mobilisation, fixation, radiotherapy and goals of treatment.
- Interpretation and limitations
- Use tools such as the Spinal Instability Neoplastic Score alongside clinical assessment. Do not use a prognostic score alone to deny referral or treatment.
- 05
Histology and staging studies - Why
- Define primary cancer and systemic disease when this will alter treatment.
- Interpretation and limitations
- Biopsy an unknown primary only if the result could change treatment and immediate intervention is not required. Never delay neurological rescue for routine staging.
- 06
Corticosteroid safety monitoring - Why
- Reduce predictable harm from high-dose dexamethasone.
- Interpretation and limitations
- Check and monitor blood glucose, infection risk, mental state and gastrointestinal risk; provide proton-pump inhibitor cover and plan taper or cessation under the MSCC team.
04Applied reasoningWorked examples connecting principles to decisions.
01Worked case: walking is worseningKnown cancer with new gait weaknessA person with metastatic breast cancer develops progressive thoracic pain, leg weakness and difficulty walking.+
- 1Treat this as suspected MSCC and an oncological emergency; contact the MSCC coordinator immediately while documenting the neurological and ambulatory baseline.
- 2Arrange whole-spine MRI locally as soon as possible and within 24 hours, using the specified sagittal sequences and axial imaging through abnormalities.
- 3Give dexamethasone 16 mg orally or equivalent parenterally as soon as possible because neurological symptoms are present; monitor glucose and provide proton-pump inhibition.
- 4Seek early spinal stability advice and use an individualised movement plan rather than automatically immobilising every patient in the same position.
- 5Coordinate surgery versus urgent radiotherapy through the spinal oncology team, incorporating compression, stability, tumour biology, prognosis, prior treatment and goals of care.
02Pain-only pathwaySuspected spinal metastasis without neurologyA person with previous cancer has new progressive mechanical spinal pain but no cord or cauda equina symptom or sign.+
- 1Contact the MSCC coordinator within 24 hours and provide explicit instructions to report any new gait, weakness, sensory, bladder or bowel change immediately.
- 2Arrange MRI to guide treatment within 1 week; do not use the 24-hour MRI standard unless clinical suspicion of cord or cauda equina compression develops.
- 3Do not routinely prescribe dexamethasone. Consider it only within NICE’s limited severe-pain or haematological-malignancy contexts and with relevant specialist advice.
03Tissue-first boundaryPossible lymphoma without neurological signsMRI shows an epidural or vertebral mass suggestive of lymphoma or myeloma, but the person has pain only and is neurologically intact.+
- 1Discuss urgently with haematology and the MSCC team before giving corticosteroids because treatment can obscure tissue diagnosis.
- 2Plan biopsy and staging if these will determine therapy and the clinical state allows; continue frequent neurological review.
- 3If neurological symptoms or signs develop, switch immediately to the MSCC emergency pathway, give indicated dexamethasone and prioritise neural rescue.
05Relevant medicines and safetySpecific regimens and precautions where medicines are relevant.
Dexamethasone
Give 16 mg orally or equivalent parenterally as soon as possible, then 16 mg daily while awaiting surgery or radiotherapy.Monitor glucose, infection, mental state, gastrointestinal and proximal-muscle effects. Taper after surgery or from radiotherapy start under specialist guidance; stop if imaging rules out spinal metastases and MSCC. Pain-only metastasis and suspected lymphoma or myeloma have different rules.
Proton-pump inhibitor
Select the agent, route and dose from current local adult prescribing guidance.Review interactions, renal and hepatic context and ongoing need. Gastroprotection does not remove dexamethasone-related glucose, infection, psychiatric, myopathy or adrenal-suppression risks.
06Checking understandingVerify the reasoning, revisit uncertainties and apply feedback.
- Repeat power, sensory level, reflexes, gait/ambulatory status and bladder/bowel assessment; escalate any deterioration immediately.
- Monitor pain at rest and with movement and obtain early specialist advice about stability and safe mobilisation.
- During dexamethasone treatment monitor glucose, mental state, infection and gastrointestinal adverse effects, with a documented taper plan.
- After surgery or radiotherapy, plan rehabilitation from admission and reassess mobility, pressure-area, bladder, bowel and venous-thromboembolism needs.
- Align follow-up with oncology, spinal surgery, rehabilitation and palliative care goals; symptom control and neurological preservation remain relevant at every prognosis.
07Special situationsVariants, exceptions and circumstances that change the usual approach.
Two clocks
Neurological MSCC has an immediate call and MRI within 24 hours; suspicious pain without neurology has advice within 24 hours and MRI within 1 week.
Whole spine means whole spine
A symptomatic level does not exclude non-contiguous metastases. Sagittal whole-spine imaging plus targeted axial sequences is the NICE standard.
Steroids have a population
The 16 mg rule is straightforward when neurological symptoms or signs exist. Pain-only disease has narrower indications and lymphoma/myeloma adds a biopsy-yield hazard.
Stability is separate from compression
A patient can have mechanical instability without major epidural compression, or cord compression without gross instability; both affect treatment.
Walking is an outcome and a sign
Documenting ambulatory function makes deterioration visible and anchors rehabilitation and treatment goals.
08Common pitfallsFrequent interpretation and management errors.
- 01
Using the within-1-week pain-only MRI route for a patient with new neurological symptoms.
- 02
Giving dexamethasone routinely for every spinal metastasis regardless of neurology, pain severity or tumour type.
- 03
Administering steroids before haematology advice in suspected lymphoma or myeloma without neurological signs.
- 04
Imaging only the painful level and missing non-contiguous disease.
- 05
Delaying emergency treatment for staging or biopsy when neurological rescue is needed.
- 06
Treating prognosis or a score as the sole reason to withhold specialist assessment.